Bible of Robert de Bello, ca. 1235, Book of Josue
London, British Library, Burney 3, fol. 90r

Matthaeus de Afflictis (1448-1528) Decisiones sacri consilii neapolitani (Lyon: 1552) Decisio 151, pp. 271-275

King Frederick IV of Naples (1496- †1504)
King of Portugal, probably Manuel I (1495- †1521)
Edict for the Expulsion of Jews 1496-1497

But concerning the contrary argument, namely, that the king of Portugal could compel the relatives of this infant and the infant to be baptized without the consent of the parents, as Guido de Baysio argued in his commentary to Gratian. Guido's reason was that Jews were slaves of the king.
But in spite of the opinions of so many men, the small children of Jews cannot be baptized if the parents are unwilling.

François Soyer, The Persecution of the Jews and Muslims of Portugal: King Manuel I and the End of Religious Tolerance (1496-7) (The Medieval Mediterranean, Peoples, Economies and Cultures, 400-1500, 69; Leiden: 2006) 194-239.

Lucia Fratterelli, "Sui battesimo dei bambini ebrei: Il caso di Livorno," Salvezza delle anime disciplina dei corpi: Un seminario sulla storia del battesimo, ed. Adriano Prosperi (Pisa: 2006) 449-482